4 * Copyright (C) 2006, 2007 OpenWrt.org
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include <linux/init.h>
22 #include <linux/types.h>
23 #include <linux/kernel.h>
24 #include <linux/string.h>
25 #include <linux/delay.h>
26 #include <linux/device.h>
27 #include <linux/ioport.h>
28 #include <linux/errno.h>
29 #include <linux/platform_device.h>
30 #include <linux/irq.h>
31 #include <linux/interrupt.h>
32 #include <linux/device.h>
33 #include <asm/addrspace.h>
35 #include <asm/ar7/vlynq.h>
37 #define PER_DEVICE_IRQS 32
39 #define VLYNQ_CTRL_PM_ENABLE 0x80000000
40 #define VLYNQ_CTRL_CLOCK_INT 0x00008000
41 #define VLYNQ_CTRL_CLOCK_DIV(x) ((x & 7) << 16)
42 #define VLYNQ_CTRL_INT_LOCAL 0x00004000
43 #define VLYNQ_CTRL_INT_ENABLE 0x00002000
44 #define VLYNQ_CTRL_INT_VECTOR(x) ((x & 0x1f) << 8)
45 #define VLYNQ_CTRL_INT2CFG 0x00000080
46 #define VLYNQ_CTRL_RESET 0x00000001
48 #define VLYNQ_STATUS_RERROR 0x00000100
49 #define VLYNQ_STATUS_LERROR 0x00000080
50 #define VLYNQ_STATUS_LINK 0x00000001
52 #define VINT_ENABLE 0x00000100
53 #define VINT_TYPE_EDGE 0x00000080
54 #define VINT_LEVEL_LOW 0x00000040
55 #define VINT_VECTOR(x) (x & 0x1f)
56 #define VINT_OFFSET(irq) (8 * ((irq) % 4))
58 #define VLYNQ_AUTONEGO_V2 0x00010000
61 volatile u32 revision;
64 volatile u32 int_prio;
65 volatile u32 int_status;
66 volatile u32 int_pending;
68 volatile u32 tx_offset;
69 volatile struct vlynq_mapping rx_mapping[4];
71 volatile u32 autonego;
72 volatile u32 unused[6];
73 volatile u32 int_device[8];
74 } __attribute__ ((packed));
77 static void vlynq_dump_regs(struct vlynq_device *dev)
80 printk("VLYNQ local=%p remote=%p\n", dev->local, dev->remote);
81 for (i = 0; i < 32; i++) {
82 printk("VLYNQ: local %d: %08x\n", i + 1, ((u32 *)dev->local)[i]);
83 printk("VLYNQ: remote %d: %08x\n", i + 1, ((u32 *)dev->remote)[i]);
87 static void vlynq_dump_mem(u32 *base, int count)
90 for (i = 0; i < (count + 3) / 4; i++) {
91 if (i % 4 == 0) printk("\nMEM[0x%04x]:", i * 4);
92 printk(" 0x%08x", *(base + i));
98 int vlynq_linked(struct vlynq_device *dev)
101 for (i = 0; i < 10; i++)
102 if (dev->local->status & VLYNQ_STATUS_LINK) {
103 printk("%s: linked\n", dev->dev.bus_id);
111 static void vlynq_irq_unmask(unsigned int irq)
114 struct vlynq_device *dev = irq_desc[irq].chip_data;
118 virq = irq - dev->irq_start;
119 val = dev->remote->int_device[virq >> 2];
120 val |= (VINT_ENABLE | virq) << VINT_OFFSET(virq);
121 dev->remote->int_device[virq >> 2] = val;
124 static void vlynq_irq_mask(unsigned int irq)
127 struct vlynq_device *dev = irq_desc[irq].chip_data;
131 virq = irq - dev->irq_start;
132 val = dev->remote->int_device[virq >> 2];
133 val &= ~(VINT_ENABLE << VINT_OFFSET(virq));
134 dev->remote->int_device[virq >> 2] = val;
137 static int vlynq_irq_type(unsigned int irq, unsigned int flow_type)
140 struct vlynq_device *dev = irq_desc[irq].chip_data;
144 virq = irq - dev->irq_start;
145 val = dev->remote->int_device[virq >> 2];
146 switch (flow_type & IRQ_TYPE_SENSE_MASK) {
147 case IRQ_TYPE_EDGE_RISING:
148 case IRQ_TYPE_EDGE_FALLING:
149 case IRQ_TYPE_EDGE_BOTH:
150 val |= VINT_TYPE_EDGE << VINT_OFFSET(virq);
151 val &= ~(VINT_LEVEL_LOW << VINT_OFFSET(virq));
153 case IRQ_TYPE_LEVEL_HIGH:
154 val &= ~(VINT_TYPE_EDGE << VINT_OFFSET(virq));
155 val &= ~(VINT_LEVEL_LOW << VINT_OFFSET(virq));
157 case IRQ_TYPE_LEVEL_LOW:
158 val &= ~(VINT_TYPE_EDGE << VINT_OFFSET(virq));
159 val |= VINT_LEVEL_LOW << VINT_OFFSET(virq);
164 dev->remote->int_device[virq >> 2] = val;
168 static irqreturn_t vlynq_irq(int irq, void *dev_id)
170 struct vlynq_device *dev = dev_id;
174 status = dev->local->int_status;
175 dev->local->int_status = status;
177 if (status & (1 << dev->local_irq)) { /* Local vlynq IRQ. Ack */
178 ack = dev->local->status;
179 dev->local->status = ack;
182 if (status & (1 << dev->remote_irq)) { /* Remote vlynq IRQ. Ack */
183 ack = dev->remote->status;
184 dev->remote->status = ack;
187 status &= ~((1 << dev->local_irq) | (1 << dev->remote_irq));
189 if (status & 1) /* Remote device IRQ. Pass. */
190 do_IRQ(dev->irq_start + virq);
198 static struct irq_chip vlynq_irq_chip = {
201 .unmask = vlynq_irq_unmask,
202 .mask = vlynq_irq_mask,
203 .set_type = vlynq_irq_type,
206 static int vlynq_setup_irq(struct vlynq_device *dev)
211 if (dev->local_irq == dev->remote_irq) {
212 printk("%s: local vlynq irq should be different from remote\n",
217 val = VLYNQ_CTRL_INT_VECTOR(dev->local_irq);
218 val |= VLYNQ_CTRL_INT_ENABLE | VLYNQ_CTRL_INT_LOCAL |
220 dev->local->int_ptr = 0x14;
221 dev->local->control |= val;
223 val = VLYNQ_CTRL_INT_VECTOR(dev->remote_irq);
224 val |= VLYNQ_CTRL_INT_ENABLE;
225 dev->remote->int_ptr = 0x14;
226 dev->remote->control |= val;
228 for (i = 0; i < PER_DEVICE_IRQS; i++) {
229 if ((i == dev->local_irq) || (i == dev->remote_irq))
231 irq_desc[dev->irq_start + i].status = IRQ_DISABLED;
232 irq_desc[dev->irq_start + i].action = 0;
233 irq_desc[dev->irq_start + i].depth = 1;
234 irq_desc[dev->irq_start + i].chip = &vlynq_irq_chip;
235 irq_desc[dev->irq_start + i].chip_data = dev;
236 dev->remote->int_device[i >> 2] = 0;
239 if (request_irq(dev->irq, vlynq_irq, SA_SHIRQ, "vlynq", dev)) {
240 printk("%s: request_irq failed\n", dev->dev.bus_id);
247 static void vlynq_free_irq(struct vlynq_device *dev)
249 free_irq(dev->irq, dev);
252 static void vlynq_device_release(struct device *dev)
254 struct vlynq_device *vdev = to_vlynq_device(dev);
258 static int vlynq_device_probe(struct device *dev)
260 struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
262 return drv->probe(to_vlynq_device(dev));
266 static int vlynq_device_remove(struct device *dev)
268 struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
270 return drv->remove(to_vlynq_device(dev));
274 int __vlynq_register_driver(struct vlynq_driver *driver, struct module *owner)
276 driver->driver.name = driver->name;
277 driver->driver.bus = &vlynq_bus_type;
278 /* driver->driver.owner = owner;*/
279 return driver_register(&driver->driver);
281 EXPORT_SYMBOL(__vlynq_register_driver);
283 void vlynq_unregister_driver(struct vlynq_driver *driver)
285 driver_unregister(&driver->driver);
287 EXPORT_SYMBOL(vlynq_unregister_driver);
289 int vlynq_device_enable(struct vlynq_device *dev)
293 struct plat_vlynq_ops *ops = dev->dev.platform_data;
295 result = ops->on(dev);
299 dev->local->control = 0;
300 dev->remote->control = 0;
302 if (vlynq_linked(dev))
303 return vlynq_setup_irq(dev);
305 for (val = 0; val < 8; val++) {
306 dev->local->control = VLYNQ_CTRL_CLOCK_DIV(val) |
307 VLYNQ_CTRL_CLOCK_INT;
308 if (vlynq_linked(dev))
309 return vlynq_setup_irq(dev);
315 void vlynq_device_disable(struct vlynq_device *dev)
317 struct plat_vlynq_ops *ops = dev->dev.platform_data;
323 u32 vlynq_local_id(struct vlynq_device *dev)
325 return dev->local->chip;
328 u32 vlynq_remote_id(struct vlynq_device *dev)
330 return dev->remote->chip;
333 void vlynq_set_local_mapping(struct vlynq_device *dev, u32 tx_offset,
334 struct vlynq_mapping *mapping)
338 dev->local->tx_offset = tx_offset;
339 for (i = 0; i < 4; i++) {
340 dev->local->rx_mapping[i].offset = mapping[i].offset;
341 dev->local->rx_mapping[i].size = mapping[i].size;
345 void vlynq_set_remote_mapping(struct vlynq_device *dev, u32 tx_offset,
346 struct vlynq_mapping *mapping)
350 dev->remote->tx_offset = tx_offset;
351 for (i = 0; i < 4; i++) {
352 dev->remote->rx_mapping[i].offset = mapping[i].offset;
353 dev->remote->rx_mapping[i].size = mapping[i].size;
357 int vlynq_virq_to_irq(struct vlynq_device *dev, int virq)
359 if ((virq < 0) || (virq >= PER_DEVICE_IRQS))
362 if ((virq == dev->local_irq) || (virq == dev->remote_irq))
365 return dev->irq_start + virq;
368 int vlynq_irq_to_virq(struct vlynq_device *dev, int irq)
370 if ((irq < dev->irq_start) || (irq >= dev->irq_start + PER_DEVICE_IRQS))
373 return irq - dev->irq_start;
376 int vlynq_set_local_irq(struct vlynq_device *dev, int virq)
378 if ((virq < 0) || (virq >= PER_DEVICE_IRQS))
381 if (virq == dev->remote_irq)
384 dev->local_irq = virq;
389 int vlynq_set_remote_irq(struct vlynq_device *dev, int virq)
391 if ((virq < 0) || (virq >= PER_DEVICE_IRQS))
394 if (virq == dev->local_irq)
397 dev->remote_irq = virq;
402 static int vlynq_probe(struct platform_device *pdev)
404 struct vlynq_device *dev;
405 struct resource *regs_res, *mem_res, *irq_res;
408 if (strcmp(pdev->name, "vlynq"))
411 regs_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
415 mem_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mem");
419 irq_res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "devirq");
423 dev = kmalloc(sizeof(struct vlynq_device), GFP_KERNEL);
425 printk(KERN_ERR "vlynq: failed to allocate device structure\n");
429 memset(dev, 0, sizeof(struct vlynq_device));
432 dev->dev.bus = &vlynq_bus_type;
433 dev->dev.parent = &pdev->dev;
434 snprintf(dev->dev.bus_id, BUS_ID_SIZE, "vlynq%d", dev->id);
435 dev->dev.bus_id[BUS_ID_SIZE - 1] = 0;
436 dev->dev.platform_data = pdev->dev.platform_data;
437 dev->dev.release = vlynq_device_release;
439 dev->regs_start = regs_res->start;
440 dev->regs_end = regs_res->end;
441 dev->mem_start = mem_res->start;
442 dev->mem_end = mem_res->end;
444 len = regs_res->end - regs_res->start;
445 if (!request_mem_region(regs_res->start, len, dev->dev.bus_id)) {
446 printk("%s: Can't request vlynq registers\n", dev->dev.bus_id);
451 dev->local = ioremap_nocache(regs_res->start, len);
453 printk("%s: Can't remap vlynq registers\n", dev->dev.bus_id);
458 dev->remote = (struct vlynq_regs *)((u32)dev->local + 128);
460 dev->irq = platform_get_irq_byname(pdev, "irq");
461 dev->irq_start = irq_res->start;
462 dev->irq_end = irq_res->end;
464 dev->remote_irq = 30;
466 if (device_register(&dev->dev))
468 platform_set_drvdata(pdev, dev);
470 printk("%s: regs 0x%p, irq %d, mem 0x%p\n",
471 dev->dev.bus_id, (void *)dev->regs_start, dev->irq,
472 (void *)dev->mem_start);
480 release_mem_region(regs_res->start, len);
485 static int vlynq_remove(struct platform_device *pdev)
487 struct vlynq_device *dev = platform_get_drvdata(pdev);
489 device_unregister(&dev->dev);
490 release_mem_region(dev->regs_start, dev->regs_end - dev->regs_start);
497 static struct platform_driver vlynq_driver = {
498 .driver.name = "vlynq",
499 .probe = vlynq_probe,
500 .remove = vlynq_remove,
503 struct bus_type vlynq_bus_type = {
505 .probe = vlynq_device_probe,
506 .remove = vlynq_device_remove,
508 EXPORT_SYMBOL(vlynq_bus_type);
511 extern void vlynq_pci_init(void);
513 int __init vlynq_init(void)
517 res = bus_register(&vlynq_bus_type);
521 res = platform_driver_register(&vlynq_driver);
532 bus_unregister(&vlynq_bus_type);
538 void __devexit vlynq_exit(void)
540 platform_driver_unregister(&vlynq_driver);
541 bus_unregister(&vlynq_bus_type);
546 subsys_initcall(vlynq_init);